Bourns 3299P-1-253 Trimmer Potentiometer: Equivalent & Substitute Parts

Part Overview

The Bourns 3299P-1-253 is a 25 kOhm, 0.5W through-hole trimmer potentiometer with PC pin termination and side adjustment capability. This sealed Trimpot® 3299 series component features cermet resistive material and is designed for precision adjustment applications requiring 25-turn resolution. The part is currently active in production with 703 units in stock. Alternative equivalent parts may be required due to design revisions, supply chain considerations, or specific compliance requirements for end applications.

Substiute Parts

3299P-1-253

Bourns Inc.In Stock: 7223299P-1-253 Datasheet

Current PartRFQ

3296P-1-253

Bourns Inc.In Stock: 12773296P-1-253 Datasheet

DirectRFQ

3299P-1-253LF

Bourns Inc.In Stock: 9853299P-1-253LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3299P-1-253 is determined by strict equivalence across the following critical parameters: resistance value (25 kOhms), power rating (0.5W), tolerance (±10%), temperature coefficient (±100ppm/°C), number of turns (25), adjustment type (side adjustment), resistive material (cermet), mounting type (through hole), and termination style (PC pins).

Two substitute parts meet these criteria:

3299P-1-253LF — Same series (Trimpot® 3299), identical electrical specifications, identical physical footprint (0.240" x 0.375"), and identical termination. Differs only in RoHS compliance status (ROHS3 Compliant vs. non-compliant).

3296P-1-253 — Different series (Trimpot® 3296), identical electrical specifications and termination, but different physical dimensions (0.375" x 0.190" vs. 0.240" x 0.375"). Suitable only where PCB layout accommodates the alternate footprint.

Parameter Comparison

Engineering Selection Recommendations

3299P-1-253LF is the primary substitute when RoHS3 compliance is required for end-product certification. Electrical performance and physical footprint are identical to the original 3299P-1-253, enabling direct PCB substitution without layout modification. Inventory availability is higher (968 units vs. 703 units).

3296P-1-253 is suitable only when PCB layout permits the alternate footprint (0.375" x 0.190" vs. 0.240" x 0.375"). All electrical parameters remain equivalent. This option provides the highest inventory availability (1261 units) but requires mechanical design verification before implementation.

Selection between substitutes should prioritize compliance requirements and physical space constraints on the target PCB assembly.

Frequently Asked Questions (FAQ)

Q: Can 3299P-1-253LF replace 3299P-1-253 without PCB modification? A: Yes. Both parts share identical electrical specifications, tolerance, temperature coefficient, number of turns, and physical footprint (0.240" x 0.375"). Direct substitution is possible. The only difference is RoHS3 compliance status.

Q: What is the key difference between 3299P-1-253 and 3296P-1-253? A: Both parts have identical electrical specifications (25 kOhms, 0.5W, ±10% tolerance, ±100ppm/°C, 25 turns, cermet material, side adjustment, PC pin termination). The 3296P-1-253 has a different physical footprint (0.375" x 0.190" vs. 0.240" x 0.375"), requiring PCB layout verification before substitution.

Q: Are all three parts sealed trimmer potentiometers? A: Yes. All three parts are sealed Trimpot® series components (3299 or 3296) designed for environmental protection and stable performance.

Q: Which substitute has the best inventory availability? A: The 3296P-1-253 has the highest stock level at 1261 units. However, its use is limited to applications where the alternate footprint is compatible with PCB design.

Q: Do all parts meet the same electrical specifications? A: Yes. All three parts are rated for 25 kOhms resistance, 0.5W power, ±10% tolerance, and ±100ppm/°C temperature coefficient with 25-turn adjustment capability.